Sparkling diamond cut



FIG. 1 is a top front perspective view of a sparkling diamond cut, showing my new design;

FIG. 2 is a front elevation view thereof; the rear elevation view, the right side elevation view, and the left side elevation view being mirror images thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

CLAIM The ornamental design for a sparkling diamond cut, as shown and described. 